Effects of G protein and cGMP on phytochrome-mediated amaranthin synthesis inAmaranthus caudatus seedlings

Science in China. Series C, Life Sciences
Z JunliS Daye

Abstract

The effects of G protein and cGMP on phytochrome-mediated amaranthin biosynthesis inAmaranthus caudatus seedlings were studied. It was shown that G protein agonist cholera toxin induced amarathin synthesis in darkness, whereas G protein antagonist pertussis toxin inhibited red light-induced amaranthin synthesis. Amaranthin synthesis was also induced by exogenous cGMP, while the amaranthin biosynthesis induced by cholera toxin, red light and exogenous cGMP was inhibited by genistein. L Y-83583, an inhibitor of guanylyl cyclase, inhibited the amarenthin synthesis induced both by red light and cholera toxin, while it was not able to inhibit the amaranthin synthesis induced by exogenous cGMP. These results suggest that G protein, guanylyl cyclase and cGMP were the candidates in phytochrone signal transduction chain for red light-induced amaranthin biosynthesis and the red light signal transduction chain might be as follows: red light --> phytochrome --> G protein --> guanylyl cyclase --> cGMP.

References

Oct 15, 1991·Proceedings of the National Academy of Sciences of the United States of America·K M WarpehaL S Kaufman
Oct 1, 1994·Current Opinion in Genetics & Development·P H Quail
Dec 1, 1994·Plant Molecular Biology·H Ma
Jul 29, 1993·Nature·E N PughR Payne
Feb 15, 1993·Proceedings of the National Academy of Sciences of the United States of America·L C Romero, E Lam

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Citations

Nov 3, 2005·Birth Defects Research. Part A, Clinical and Molecular Teratology·Wei CuiJeffrey Roth

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